PSA-type liquid crystal composition and display device having same

ABSTRACT

A PSA-type liquid crystal composition includes a host liquid crystal A and a polymerizable component B, where the host liquid crystal A includes one or more liquid crystal compounds, and the polymerizable component B includes at least one compound selected from compounds of general formula I-1, general formula I-2 and general formula I-3. A liquid crystal display device includes the PSA-type liquid crystal composition above. The PSA-type liquid crystal composition has better intersolubility, cannot be crystallized at a low-temperature environment, can form a relatively stable pretilt angle after the polymerization of the polymerizable component, avoids the image sticking, and inhibits the occurrence of a display defect, such as Zara Particle, during the polymerization.

TECHNICAL FIELD

The present invention relates to the field of liquid crystal material,particularly to a PSA-type liquid crystal composition and a displaydevice having the same.

BACKGROUND ARTS

Liquid crystal displays (LCDs) have gained rapid development due totheir small size, light weight, low power consumption and excellentdisplay quality, and in particular, have been widely used in portableelectronic information products. Based on the displaying mode, liquidcrystal displays can be classified into the types of PC (phase change),TN (twisted nematic), STN (super twisted nematic), ECB (electricallycontrolled birefringence), OCB (optically compensated bend), IPS(in-plane switching), FFS (fringe field switching), VA (verticalalignment), PSA (polymer stable alignment), and the like.

A PSA-type liquid crystal display device is manufactured by adding asmall amount (such as 0.3 wt %, typically, <1 wt %) of one or morepolymerizable compounds into a liquid crystal composition, filling thesame into a liquid crystal cell, and polymerizing, usually via a UVphotopolymerization, or crosslinking the polymerizable compounds in suitunder a condition where liquid crystal molecules are initially alignedwith or without a voltage applied between electrodes, thereby fixing thealignment of the liquid crystal molecules. The polymerization is carriedout at a temperature where the liquid crystal composition exhibits aliquid crystal phase, usually at room temperature. It has been proventhat the addition of polymerizable liquid crystal compounds to a liquidcrystal composition is particularly suitable since the polymer structureformed by the polymerizable liquid crystal compounds in the unit canwell control the tilt angle of liquid crystal molecules, and that thePSA-type liquid crystal display device has a high response speed and ahigh contrast.

Therefore, PSA-type liquid crystal display device is continuouslydeveloped, and the PSA principle is also used in various conventionalliquid crystal displays, such as the known PSA-VA, PSA-OCB, PSA-IPS,PSA-FFS, and PSA-TN displays. Like the conventional LC displays, PSAdisplays can be operated as active-matrix or passive-matrix displays. Inthe case of active-matrix displays, individual pixels are usuallyaddressed by integrated, non-linear active elements, such astransistors, while in the case of passive-matrix displays, individualpixels are usually addressed by the multiplex method, as known from theprior art.

However, there are some display defects such as image sticking inPSA-type liquid crystal display device. Studies have shown that suchproblems are mostly caused by the presence of impurities and changes inthe alignment of liquid crystal molecules (changes in the pretiltangle), and the alignment of liquid crystal molecules is controlled by apolymer network formed by the polymerization of polymerizable compounds.If the structural rigidity of the polymerizable compounds constitutingthe polymer network is insufficient, the structure of the polymernetwork may change when the PSA-type liquid crystal display devicecontinuously displays the same pattern for a long time, thereby causingthe changes in the pretilt angle of liquid crystal molecules. Therefore,it is generally necessary to select a polymerizable compound having arigid structure.

In order to prevent image sticking by improving the rigidity of apolymer, it has been investigated to constitute a display device using apolymerizable compound having a structure of 1,4-phenylene group or thelike, which contains only a ring structure and a polymerizablefunctional group (refer to Patent Literature JP2003307720A), orconstitute a display device using a polymerizable compound having abiaryl structure (refer to Patent Literature JP2008116931A). However,such polymerizable compounds have low compatibility with liquid crystalcompounds and thus, when a liquid crystal composition containing apolymerizable compound is prepared, the problems such as precipitationof the polymerizable compound are produced, leading to the need forimprovement in compatibility with the liquid crystal composition.

Moreover, it has been proposed to constitute a display device using amixed liquid crystal composition containing a bifunctional polymerizablecompound and a tri- or higher-functional polymerizable compound, such asdipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, or thelike (refer to Patent Literature JP2004302096A). However,dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate haveno ring structure in the molecules thereof and thus have weak affinityfor liquid crystal compounds and weak force to regulate alignment,thereby causing the problem of failing to achieve satisfactory alignmentstability. In addition, polymerization of these polymerizable compoundsrequires a polymerization initiator to be added, and if a polymerizationinitiator is not added, the polymerizable compounds remain afterpolymerization.

In order to further improve the response speed, various combinations ofliquid crystal compositions and polymerizable compounds are alsodisclosed in the prior art (see Patent Literature WO2010084823A1).However, a relation between the pretilt angle and response speed isgenerally known, and a significant improvement effect has not beenconfirmed. Since liquid crystal compounds containing an alkenyl groupand chlorine atom are used, a defective display is highly likely to becaused, and there will also result in environmental issues.

Therefore, there is a need for developing a PSA-type liquid crystalcomposition, which has no precipitation of polymerizable compounds in awide temperature range, has a rapid response speed and has no displaydefects such as image sticking, and a liquid crystal display devicehaving the same.

SUMMARY OF THE INVENTION

Objects: In view of the defects in the prior art, it is an object of thepresent invention to provide a PSA-type liquid crystal composition,which has good intersolubility, high response speed and has no displaydefects such as image sticking. It is another object of the presentinvention to provide a display device comprising the PSA-type liquidcrystal composition above.

Technical Solutions of the Present Invention

In order to achieve the above objects, the present invention provides aPSA-type liquid crystal composition comprising a host liquid crystal Aand a polymerizable component B, wherein the host liquid crystal Acomprises one or more liquid crystal compounds, and the polymerizablecomponent B comprises at least one compound selected from a groupconsisting of the compounds of general formula I-1, general formula I-2and general formula I-3:

in which,

ring A, ring B, ring C, ring D, ring E, ring F, ring G, ring H and ringI each independently represents phenylene or naphthylene;

X₁₋₁, X₁₋₂, X₁₋₃, X₂₋₁, X₂₋₂, X₂₋₃, X₂₋₄, X₃₋₁, X₃₋₂, X₃₋₃, X₃₋₄ andX₃₋₅ each independently represents a single bond, or a C₁₋₁₂ linear orbranched alkylene, wherein one or more —CH₂— in the C₁₋₁₂ linear orbranched alkylene can be replaced by —O—, —S—, —NH—, —CO—, —CH═CH— or—C≡C— in a manner that heteroatoms are not directly connected to eachother, —H in one or more —CH₂— in the C₁₋₁₂ linear or branched alkylenecan be substituted by halogen, and wherein at least one of X₁₋₁, X₁₋₂and X₁₋₃ represents a single bond, at least one of X₂₋₁, X₂₋₂, X₂₋₃ andX₂₋₄ represents a single bond, and at least one of X₃₋₁, X₃₋₂, X₃₋₃,X₃₋₄ and X₃₋₅ represents a single bond;

R_(A), R_(B), R_(C), R_(D), R_(E), R_(F), R_(G), R_(H) and R_(I) eachindependently represents halogen, or a C₁₋₅ halogenated or unhalogenatedlinear or branched alkyl or alkoxy;

P₁₋₁, P₁₋₂, P₂₋₁, P₂₋₂, P₃₋₁ and P₃₋₂ each independently represents apolymerizable group;

a, b, c, d, e, f, g, h and i each independently represents 0, 1, 2 or 3,and when a is 2 or 3, R_(A) can be same or different; when b is 2 or 3,R_(B) can be same or different; when c is 2 or 3, R_(C) can be same ordifferent; when d is 2 or 3, R_(D) can be same or different; when e is 2or 3, R_(E) can be same or different; when f is 2 or 3, R_(F) can besame or different; when g is 2 or 3, R_(G) can be same or different;when h is 2 or 3, R_(H) can be same or different; when i is 2 or 3,R_(I) can be same or different;

a+b+n₁≥1, and n₁≥1, wherein n₁ represents the number of groups that arenot single bond in X₁₋₁, X₁₋₂ and X₁₋₃;

c+d+e+n₂≥2, and n₂≥1, wherein n₂ represents the number of groups thatare not single bond in X₂₋₁, X₂₋₂, X₂₋₃ and X₂₋₄; and

f+g+h+i+n₃≥3, and n₃≥1, wherein n₃ represents the number of groups thatare not single bond in X₃₋₁, X₃₋₂, X₃₋₃, X₃₋₄ and X₃₋₅.

In some embodiments of the present invention, ring A, ring B, ring C,ring D, ring E, ring F, ring G, ring H and ring I preferably eachindependently represents phenylene.

In some embodiments of the present invention, X₁₋₁, X₁₋₂, X₁₋₃, X₂₋₁,X₂₋₂, X₂₋₃, X₂₋₄, X₃₋₁, X₃₋₂, X₃₋₃, X₃₋₄ and X₃₋₅ each independentlypreferably represents a single bond, —CH₂O—, —OCH₂—, —CO—O—, —O—CO—,—CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₂O—, —(CH₂)₃O—, —O(CH₂)₃—, —O—,—CF₂—, —CF₂O—, —OCF₂—, —CH(CH₃)CH₂—, —C(CH₃)₂CH₂—, —CH₂C(CH₃)₂—,—C(CH₃)₂CH(CH₃)—, —C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—, —OC(CH₃)₂—,—CH(CH₂CH₃)CH₂—, —O—, —S—, —NH—, —NH—CO—O—, —O—CO—NH—, —SCH₂—, —CH₂S—,—CH═CH—, —C≡C—, —CH═CH—CO—O— or —O—CO—CH═CH—.

In some embodiments of the present invention, R_(A), R_(B), R_(C),R_(D), R_(E), R_(F), R_(G), R_(H) and R_(I) each independentlypreferably represents —F, —CH₂F, —CHF₂, —CF₃, —CH₃, —OCH₃, —CH₂CH₃ or—OCH₂CH₃.

In some embodiments of the present invention, P₁₋₁, P₁₋₂, P₂₋₁, P₂₋₂,P₃₋₁ and P₃₋₂ each independently preferably represents

In some embodiments of the present invention, a+b+n₁≥2; c+d+e+n₂≥3; andf+g+h+i+n₃≥4.

In some embodiments of the present invention, X₁₋₂, X₂₋₂, X₂₋₃, X₃₋₂,X₃₋₃ and X₃₋₄ each independently represents a single bond, —CH₂O—,—OCH₂—, —CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₃O—, —O(CH₂)₃—, —O—, —CF₂—,—CF₂O—, —OCF₂—, —CH(CH₃)CH₂—, —C(CH₃)₂CH₂—, —CH₂C(CH₃)₂—,—C(CH₃)₂CH(CH₃)—, —C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—, —OC(CH₃)₂—,—CH(CH₂CH₃)CH₂—, —S—, —NH—, —NH—CO—O—, —O—CO—NH—, —SCH₂—, —CH₂S—,—CH═CH—, —C≡C—, —CH═CH—CO—O— or —O—CO—CH═CH—.

In some embodiments of the present invention, if X₁₋₂ represents —CO— or—O—CO—, then a+b≠0; if both X₂₋₂ and X₂₋₃ represent —CO— or —O—CO—, thenc+d+e≠0; if all of X₃₋₂, X₃₋₃ and X₃₋₄ represent —CO— or —O—CO—, thenf+g+h+i 0.

In some embodiments of the present invention, both X₁₋₁ and X₁₋₃represent single bond, and X₁₋₂ represents —CH₂O—, —OCH₂—, —CO—O—,—O—CO—, —CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₃O—, —O(CH₂)₃—, —O—, —CF₂—,—CF₂O—, —OCF₂—, —CH(CH₃)CH₂—, —C(CH₃)₂CH₂—, —CH₂C(CH₃)₂—,—C(CH₃)₂CH(CH₃)—, —C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—, —OC(CH₃)₂—,—CH(CH₂CH₃)CH₂—, —S—, —NH—, —NH—CO—O—, —O—CO—NH—, —SCH₂—, —CH₂S—,—CH═CH—, —C≡C—, —CH═CH—CO—O— or —O—CO—CH═CH—.

In some embodiments of the present invention, the polymerizablecomponent B only comprises one compound of general formula I-1, whereinboth X₁₋₁ and X₁₋₃ represent single bond, X₁₋₂ represents —CH₂O—,—OCH₂—, —CO—O—, —O—CO—, —CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₃O—,—O(CH₂)₃—, —O—, —CF₂—, —CF₂O—, —OCF₂—, —CH(CH₃)CH₂—, —CH₂C(CH₃)₂—,—C(CH₃)₂CH₂—, —C(CH₃)₂CH(CH₃)—, —C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—,—OC(CH₃)₂—, —CH(CH₂CH₃)CH₂—, —S—, —NH—, —NH—CO—O—, —O—CO—NH—, —SCH₂—,—CH₂S—, —CH═CH—, —C≡C—, —CH═CH—CO—O— or —O—CO—CH═CH—, and a+b≠0.

In some embodiments of the present invention, if the polymerizablecomponent B comprises one compound of general formula I-1 in whicha+b+n₁=1, it at least further comprises another compound selected fromthe group consisting of the compounds of general formula I-1, generalformula I-2 and general formula I-3.

In some embodiments of the present invention, at least one of X₂₋₁ andX₂₋₄ represents a single bond; and when both X₂₋₁ and X₂₋₄ representsingle bond, at least one of X₂₋₂ and X₂₋₃ is not a single bond, andc+d+e≥1.

In some embodiments of the present invention, if the polymerizablecomponent B comprises two or three polymerizable compounds, and at leastone of two or three polymerizable compounds is selected from thecompounds of general formula I-2, at least one of X₂₋₁ and X₂₋₄represents a single bond; and when both X₂₋₁ and X₂₋₄ represent singlebond, at least one of X₂₋₂ and X₂₋₃ is not a single bond, and c+d+e≥1.

In some embodiments of the present invention, at least one of X₃₋₁ andX₃₋₅ represents a single bond; and when both X₃₋₁ and X₃₋₅ are singlebond, at least one of X₃₋₂, X₃₋₃ and X₃₋₄ is not a single bond, andf+g+h+i≥2; when only one of X₃₋₁ and X₃₋₅ represents a single bond, atmost one of X₃₋₂, X₃₋₃ and X₃₋₄ is not a single bond, and f+g+h+i≥2.

In some embodiments of the present invention, if the polymerizablecomponent B comprises two or three polymerizable compounds, and at leastone of two or three polymerizable compounds is selected from thecompounds of general formula I-3, at least one of X₃₋₁ and X₃₋₅represents a single bond; and when both X₃₋₁ and X₃₋₅ are single bond,at least one of X₃₋₂, X₃₋₃ and X₃₋₄ is not a single bond, and f+g+h+i≥2;when only one of X₃₋₁ and X₃₋₅ represents a single bond, at most one ofX₃₋₂, X₃₋₃ and X₃₋₄ is not a single bond, and f+g+h+i≥2.

In some embodiments of the present invention, the compound of generalformula I-1 is selected from a group consisting of the followingcompounds:

In which, R_(A), R_(B), a and b each can be same or different and hasone of the meanings indicated above or below.

In some embodiments of the present invention, the compound of generalformula I-2 is selected from a group consisting of the followingcompounds:

In which, R_(C), R_(D), R_(E), c, d and e each can be same or differentand has one of the meanings indicated above or below.

In some embodiments of the present invention, the compound of generalformula I-3 is selected from a group consisting of the followingcompounds:

In which, R_(F), R_(G), R_(H), R_(I), f, g, h and i each can be same ordifferent and has one of the meanings indicated above or below.

In general formula I-1-1 to general formula I-1-24, general formulaI-2-1 to general formula-2-56, and general formula I-3-1 to generalformula I-3-20 above,

each independently preferably represents a group selected from a groupconsisting of the following groups:

In some embodiments of the present invention, the polymerizablecomponent B provides 0.01-5% of the total weight of the PSA-type liquidcrystal composition; preferably, the polymerizable component B provides0.05-4% of the total weight of the PSA-type liquid crystal composition;further preferably, the polymerizable component B provides 0.1-3% of thetotal weight of the PSA-type liquid crystal composition.

In some embodiments of the present invention, the host liquid crystal Acomprises one or more compounds of general formula M:

in which,R_(M1) and R_(M2) each independently represents a C₁₋₁₂ linear orbranched alkyl,

one or more nonadjacent —CH₂— in the C₁₋₁₂ linear or branched alkyl caneach be independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —CO—O— or—O—CO—;ring M₁, ring M₂ and ring M₃ each independently represents

wherein one or more —CH₂— in

can be replaced by —O—, and at most one —H on

can be substituted by halogen;Z_(M1) and Z_(M2) each independently represents a single bond, —CO—O—,—O—CO—, —CH₂O—, —OCH₂—, —CH═CH—, —C≡C—, —CH₂CH₂—, —(CH₂)₄—, —CF₂O—,—OCF₂— or —CF₂CF₂—; andn_(M1) represents 0, 1, 2 or 3, and when n_(M1)=2 or 3, ring M₂ can besame or different, and Z_(M2) can be same or different.

In some embodiments of the present invention, in the compound of generalformula M, R_(M1) and R_(M2) are preferably each independently a C₁₋₁₀linear alkyl, a C₁₋₉ linear alkoxy, or a C₂₋₁₀ linear alkenyl; furtherpreferably, a C₁₋₈ linear alkyl, a C₁₋₇ linear alkoxy, or a C₂₋₈ linearalkenyl; still further preferably, a C₁₋₅ linear alkyl, a C₁₋₄ linearalkoxy, or a C₂₋₅ linear alkenyl.

In some embodiments of the present invention, preferably, R_(M1) and/orR_(M2) are each independently a C₂₋₈ linear alkenyl, further preferably,a C₂₋₅ linear alkenyl.

In some embodiments of the present invention, preferably, one of R_(M1)and R_(M2) is a C₂₋₅ linear alkenyl, while the other is a C₁₋₅ linearalkyl.

In some embodiments of the present invention, both R_(M1) and R_(M2) arepreferably a C₁₋₈ linear alkyl, or a C₁₋₇ linear alkoxy; furtherpreferably, a C₁₋₅ linear alkyl, or a C₁₋₄ linear alkoxy.

In some embodiments of the present invention, preferably, one of R_(M1)and R_(M2) is a C₁₋₅ linear alkyl, while the other is a C₁₋₅ linearalkyl or a C₁₋₄ linear alkoxy; further preferably, both R_(M1) andR_(M2) are a C₁₋₅ linear alkyl.

The alkenyl group in the present invention is preferably selected fromthe groups represented by any one of formula (V1) to formula (V9),particularly formula (V1), formula (V2), formula (V8) or formula (V9).The groups represented by formula (V1) to formula (V9) are as follows:

in which, * represents bound carbon atom in the ring structure.

The alkenoxy group in the present invention is preferably selected fromthe groups represented by any one of formula (OV1) to formula (OV9),particularly formula (OV1), formula (OV2), formula (OV8) or formula(OV9). The groups represented by formula (OV1) to formula (OV9) are asfollows:

in which, * represents bound carbon atom in the ring structure.

In some embodiments of the present invention, the compound of generalFormula M is selected from a group consisting of the followingcompounds:

In some embodiments of the present invention, the compound of generalformula M is preferably selected from a group consisting of thecompounds of general formula M1, general formula M2, general formula M4,general formula M9, general formula M11, general formula M20 and generalformula M21.

The preferred lower limit of the content of the compound of generalformula M is 1%, 10%, 20%, 30%, 40% or 50%, relative to the total weightof the PSA-type liquid crystal composition of the present invention; andthe preferred upper limit of the content of the compound of generalformula M is 95%, 85%, 75%, 65%, 60%, 55%, 45%, 35% or 25%, relative tothe total weight of the PSA-type liquid crystal composition of thepresent invention.

Regarding the content of the compound of general formula M, the lowerand the upper limits thereof are preferably higher when it is desired tomaintain the PSA-type liquid crystal composition of the presentinvention with lower viscosity and shorter response time; further, thelower and the upper limits thereof are preferably higher when it isdesired to maintain the PSA-type liquid crystal composition of thepresent invention with higher clearing point and good temperaturestability; the lower and the upper limits thereof are preferably loweredin order to maintain lower driving voltage and make the absolute valueof the dielectric anisotropy larger.

With emphasis in reliability, both R_(M1) and R_(M2) are preferably eachindependently alkyl; with emphasis in reducing the volatility of thecompound, both R_(M1) and R_(M2) are preferably each independentlyalkoxy; and with emphasis in reducing the viscosity, at least one ofR_(M1) and R_(M2) is preferably alkenyl.

In some embodiments of the present invention, the host liquid crystal Aat least comprises one or more compounds selected from a groupconsisting of the compounds of general formula M1-a, general formulaM1-b and general formula M1-c:

In some embodiments of the present invention, the host liquid crystal Afurther comprises one or more compounds of general formula N:

in which

R_(N1) and R_(N2) each independently represents a C₁₋₁₂ linear orbranched alkyl,

one or more nonadjacent —CH₂— in the C₁₋₁₂ linear or branched alkyl caneach be independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —CO—O— or—O—CO—, and one or more —H presented on these groups can each beindependently substituted by —F or —Cl;

ring

and ring

each independently represents

wherein one or more —CH₂— in

can be replaced by —O—, one or at most two single bonds in the ring canbe replaced by double bond, wherein one or more —H on

can be substituted by —F or —Cl, and one or more —CH═ in the ring can bereplaced by —N═;

Z_(N1) and Z_(N2) each independently represents a single bond, —CO—O—,—O—CO—, —CH₂O—, —OCH₂—, —CH═CH—, —C≡C—, —CH₂CH₂—, —(CH₂)₄—, —CF₂O—,—OCF₂— or —CF₂CF₂—; and

n_(N1) represents 0, 1, 2 or 3, n_(N2) represents 0 or 1, and0≤n_(N1)+n_(N2)≤3, and when n_(N1)=2 or 3, ring

can be same or different, and Z_(N1) can be same or different.

In some embodiments of the present invention, in the compound of generalformula N, R_(N1) and R_(N2) are preferably each independently a C₁₋₈alkyl or alkoxy, or a C₂₋₈ alkenyl or alkenoxy; further preferably, aC₁₋₅ alkyl or alkoxy, or a C₂₋₅ alkenyl or alkenoxy;

R_(N1) is further preferably a C₁₋₅ alkyl, or a C₂₋₅ alkenyl, stillfurther preferably, a C₂₋₅ alkyl or a C₂₋₃ alkenyl;

R_(N2) is further preferably a C₁₋₄ alkoxy; and

ring

and ring

are preferably

In some embodiments of the present invention, the compound of generalformula N is selected from a group consisting of the followingcompounds:

In some embodiments of the present invention, the compound of generalFormula N is preferably selected from a group consisting of thecompounds of general formula N2, general formula N3, general formula N5,general formula N8, general formula N12 and general formula N14.

In some embodiments of the present invention, the PSA-type liquidcrystal composition of the present invention preferably comprises one ormore compounds of general Formula N; more preferably one or morecompounds selected from a group consisting of the compounds of generalformula N2 to general formula N7, and general formula N10 to generalFormula N21; and further preferably two to ten compounds selected from agroup consisting of the compounds of general formula N2 to generalformula N7, and general formula N10 to general Formula N21.

Regarding the preferred content of the compound of general formula N:the preferred lower limit of the content of the compound of generalFormula N is 0.1%, 0.5%, 1%, 3%, 5%, 10%, 13%, 15%, 18%, 20%, 23%, 25%,28%, 30%, 33%, 35%, 38% or 40%, relative to the total weight of thePSA-type liquid crystal composition of the present invention; and thepreferred upper limit of the content of the compound of general formulaN is 95%, 90%, 88%, 85%, 83%, 80%, 78%, 75%, 73%, 70%, 68%, 65%, 63%,60%, 55%, 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15% or10%, relative to the total weight of the PSA-type liquid crystalcomposition of the present invention.

Regarding the preferred content of the compound of general formula N:the lower and the upper limits thereof are preferably lower when it isdesired to maintain the PSA-type liquid crystal composition of thepresent invention with lower viscosity and shorter response time;further, the lower and the upper limits thereof are preferably lowerwhen it is desired to maintain the PSA-type liquid crystal compositionof the present invention with higher clearing point and good temperaturestability; furthermore, the lower and the upper limits thereof arepreferably increased in order to maintain lower driving voltage and makethe absolute value of the dielectric anisotropy larger.

In some embodiments of the present invention, the PSA-type liquidcrystal composition further comprises one or more additives known to theskilled artisan in the art and described in the literatures.

Stabilizers which can be added to the PSA-type liquid crystalcomposition according to the present invention are mentioned below.

The stabilizer is preferably selected from the stabilizers as shownbelow.

In some embodiments of the present invention, preferably, the stabilizerprovides 0-5% of the total weight of the PSA-type liquid crystalcomposition; more preferably, the stabilizer provides 0-1% of the totalweight of the PSA-type liquid crystal composition; particularlypreferably, the stabilizer provides 0.01-0.1% of the total weight of thePSA-type liquid crystal composition.

In another aspect, the present invention further provides a liquidcrystal display device comprising the PSA-type liquid crystalcomposition provided by the present invention.

Beneficial Effects

By improving the functional groups of the polymerizable compound(including a linking group between the rings, a substituent group on thering, and a linking group between the polymerizable group and the ring),the PSA-type liquid crystal composition provided by the presentinvention effectively improves the intersolubility between thepolymerizable component and the host liquid crystal, such that theliquid crystal composition can maintain a nematic phase state withoutcrystallization even in a low-temperature environment, and there is nocrystallization and the performance changes caused thereby duringtransportation and manufacturing. The PSA-type liquid crystalcomposition of the present invention has extremely low viscosity, whichcan meet the requirements of a liquid crystal display device with a fastresponse speed (such as a 3D display). In addition, the polymerizablecompound of the present invention has an appropriate polymerizationspeed which is not too fast or too slow during photopolymerization, suchthat an uniform and stable alignment control can be achieved, and aliquid crystal display device in which image sticking and displayunevenness occur less or not at all can be provided. In conclusion, thePSA-type liquid crystal composition provided by the present inventionhas better intersolubility, cannot be crystallized at a low-temperatureenvironment, can form a stable pretilt angle, and inhibits theoccurrence of a display defect, such as Zara Particle, during thepolymerization.

DETAILED EMBODIMENTS

The present invention will be illustrated by combining the detailedembodiments below. It should be noted that, the following examples areexemplary embodiments of the present invention, which are only used toillustrate the present invention, not to limit it. Other combinationsand various modifications within the conception of the present inventionare possible without departing from the subject matter and scope of thepresent invention.

Unless specifically indicated, in the present invention, all ratios areweight ratios, and all temperatures are degree centigrade.

For the convenience of the expression, the group structures of theliquid crystal compositions in the following Examples are represented bythe codes listed in Table 1′:

TABLE 1′ Codes of the group structures of the liquid crystal compoundsUnit structure of group Code Name of the group

C 1,4-cyclohexylidene

C(5) cyclopentyl

P 1,4-phenylene

G 2-fluoro-1,4-phenylene

W 2,3-difluoro-1,4- phenylene —CH₂CH₂— 2 ethyl bridge bond —OCF₃ OCF3trifluoromethoxy —F F fluoro substituent —O— O oxygen substituent —CF₂O—Q difluoromethoxy —COO— E ester bridge bond —C_(n)H_(2n+1) n (nrepresents alkyl a positive integer of 1-12) —CH═CH— or —CH═CH₂ Vethenyl

Take the compound with the following structural formula as an example:

Represented by the codes listed in Table A, this structural formula canbe expressed as nCCGF, in which, n in the code represents the number ofthe carbon atoms of the alkyl group on the left, for example, n is “3”,meaning that the alkyl is —C₃H₇; C in the code represents cyclohexyl, Grepresent 2-fluoro-1,4-phenylene, F represents fluorine.

The abbreviated codes of the test items in the following Examples arerepresented as follows:

Cp (° C.) clearing point (nematic-isotropy phases transitiontemperature) Δn optical anisotropy (589 nm, 25° C.) Δε dielectricanisotropy (1 KHz, 25° C.) γ1 rotational viscosity (mPa * s, at 25° C.)LTS low-temperature stability (° C., a temperature at which a storage isperformed for 500 h without crystallization)

In which,

The optical anisotropy is tested and obtained by using an AbbeRefractometer under a sodium lamp (589 nm) light source at 25° C.

Δε=ε_(I)-ε_(⊥), in which, ε_(I) is a dielectric constant parallel to themolecular axis, ε_(⊥) is a dielectric constant perpendicular to themolecular axis, with the test conditions: 25° C., 1 KHz, TN90-type testcell with a cell gap of 7 μm.

γ1 is tested by a TOYO6254-type liquid crystal physical propertyevaluation system; the test temperature is 25° C., and the test voltageis 90 V.

The components used in the following Examples can either be synthesizedby method known in the art or be obtained commercially. The synthetictechniques are conventional, and each of the obtained liquid crystalcompounds is tested to meet the standards of electronic compound.

Example 1 of Host Liquid Crystal

The nematic host liquid crystal Host 1 is prepared according to Table 1below.

TABLE 1 Composition and performance parameters of Host 1 Code of Weightcomponent percentage Performance parameters 3CC2 20 Δn 0.097 3CCV1 9 Δε−3.3 4CC3 5 Cp 75 5CC3 8 γ1 86 3CCP1 6 LTS <−30° C. 3CWO2 13 3PWO2 102CPWO2 8 3CCWO2 11 3CPWO2 10 Total 100

Example 2 of Host Liquid Crystal

The nematic host liquid crystal Host 2 is prepared according to Table 2below.

TABLE 2 Composition and performance parameters of Host 2 Code of Weightcomponent percentage Performance parameters 3CC2 24 Δn 0.109 4CC3 3 Δε−3.2 5PP1 12 Cp 75 3PWO2 10 γ1 95 5CC3 4 LTS <−30° C. 3C1OWO2 4 3CCP1 23CPP2 15 3CPWO2 8 2CC1OWO2 7 3CC1OWO2 11 Total 100

Example 3 of Host Liquid Crystal

The nematic host liquid crystal Host 3 is prepared according to Table 3below.

TABLE 3 Composition and performance parameters of Host 3 Code of Weightcomponent percentage Performance parameters 3CC2 24 Δn 0.1 3CPO2 3 Δε−3.3 4CC3 6 Cp 75 5PP1 16 γ1 105 5CC3 5 LTS <−30° C. 3CPP2 6 3C1OWO2 62CPWO2 5 3CCWO2 5 3CPWO2 8 2CC1OWO2 6 3CC1OWO2 10 Total 100

Example 4 of Host Liquid Crystal

The nematic host liquid crystal Host 4 is prepared according to Table 4below.

TABLE 4 Composition and performance parameters of Host 4 Code of Weightcomponent percentage Performance parameters 3CPWO2 10 Δn 0.109 3C1OWO211.5 Δε −3 2CC1OWO2 8 Cp 74.3 3CC1OWO2 9 γ1 96 2C1OWO2 5 LTS <−30° C.3CPP2 13 3CPPC3 1 3CC2 22 2CPP2 7 5PP1 13.5 Total 100

Example 5 of Host Liquid Crystal

The nematic host liquid crystal Host 5 is prepared according to Table 5below.

TABLE 5 Composition and performance parameters of Host 5 Code of Weightcomponent percentage Performance parameters 3C1OWO2 6.5 Δn 0.1 2CC1OWO23.5 Δε −3.5 3CC1OWO2 8 Cp 95 3CCWO2 6 γ1 126 5CCWO2 3 LTS <−40° C.2CCWO2 3.5 5CC1OWO2 8 2C1OWO2 3.5 5C1OWO2 4.5 3CPWO2 2 3CPO1 4 3CPP213.5 3CPPC3 2 3CGPC3 1 3CC2 15 5CC2 3 4CC3 5 2CPP2 5 3PPO2 3 Total 100

Example 6 of Host Liquid Crystal

The nematic host liquid crystal Host 6 is prepared according to Table 6below.

TABLE 6 Composition and performance parameters of Host 6 Code of Weightcomponent percentage Performance parameters 3CC1 9 Δn 0.109 3PP1 13 Δε−3.3 3CPO1 2 Cp 74.3 4CC3 9 γ1 83 5CC3 7 LTS <−30° C. 3CPP2 7 2CPWO2 63CCWO2 13 3CPWO2 13 3CWO4 4 2CCWO2 4 3CWO2 13 Total 100

Example 7 of Host Liquid Crystal

The nematic host liquid crystal Host 7 is prepared according to Table 7below.

TABLE 7 Composition and performance parameters of Host 7 Code of Weightcomponent percentage Performance parameters 2CPWO2 4 Δn 0.1 3CPWO2 5 Δε−2.8 3C1OWO2 7 Cp 110 2CC1OWO2 10 γ1 138 3CC1OWO2 10 LTS <−40° C.4CC1OWO2 10 3CPO2 3 3CPP2 6 3CPPC3 3 3CGPC3 4 3CC2 18 4CC3 6 3CCP1 105PP1 4 Total 100

Example 8 of Host Liquid Crystal

The nematic host liquid crystal Host 8 is prepared according to Table 8below.

TABLE 8 Composition and performance parameters of Host 8 Code of Weightcomponent percentage Performance parameters 3CC2 20 Δn 0.090 3CCV1 9 Δε−3.3 4CC3 5 Cp 76.3 5CC3 8 γ1 92 3CCP1 6 LTS <−30° C. 3CWO2 13 3PWO2 103CPWO2 8 2CCWO2 10 3CCWO2 11 Total 100

Example 9 of Host Liquid Crystal

The nematic host liquid crystal Host 9 is prepared according to Table 9below.

TABLE 9 Composition and performance parameters of Host 9 Code of Weightcomponent percentage Performance parameters 3CC2 25 Δn 0.089 3CCV1 9 Δε−3.3 5CC3 8 Cp 73.6 3CCP1 6 γ1 82 3CWO2 13 LTS <−30° C. 3PWO2 10 2CPWO28 3CCWO2 11 3CPWO2 10 Total 100

Example 10 of Host Liquid Crystal

The nematic host liquid crystal Host 10 is prepared according to Table10 below.

TABLE 10 Composition and performance parameters of Host 10 Code ofWeight component percentage Performance parameters 3CC2 24 Δn 0.104 4CC33 Δε −4 5CC3 4 Cp 75.6 5PP1 6 γ1 95 3CCP1 2 LTS <−30° C. 3CPP2 15 3PWO210 3C1OWO2 10 3CPWO2 8 2CC1OWO2 7 3CC1OWO2 11 Total 100

Example 11 of Host Liquid Crystal

The nematic host liquid crystal Host 11 is prepared according to Table11 below.

TABLE 11 Composition and performance parameters of Host 11 Code ofWeight component percentage Performance parameters 3C1OWO2 7 Δn 0.1082CC1OWO2 3 Δε −3.6 3CC1OWO2 8 Cp 105 3CCWO2 6 γ1 138 5CCWO2 3 LTS <−40°C. 2CCWO2 3 5CC1OWO2 8 2C1OWO2 4 5C1OWO2 4 3CPWO2 2 3CPO1 4 3CPP2 143CPPC3 2 3CGPC3 1 3CC2 15 5CC2 3 2CPP2 10 3PPO2 3 Total 100

Example 12 of Host Liquid Crystal

The nematic host liquid crystal Host 12 is prepared according to Table12 below.

TABLE 12 Composition and performance parameters of Host 12 Code ofWeight component percentage Performance parameters 3CPWO2 12 Δn 0.113C1OWO2 13 Δε −4.2 2CC1OWO2 5.5 Cp 74.6 3CC1OWO2 10 γ1 121 2C1OWO2 8 LTS<−30° C. 4C1OWO2 4.5 3CC2 21 5PP1 10 2CPP2V1 5 3CPP2V1 11 Total 100

Example 13 of Host Liquid Crystal

The nematic host liquid crystal Host 13 is prepared according to Table13 below.

TABLE 13 Composition and performance parameters of Host 13 Code ofWeight component percentage Performance parameters 3CC2 23 Δn 0.1 3CCV110 Δε −3.3 5PP1 6 Cp 72.9 5CC3 10 γ1 105 3C1OWO2 8 LTS <−30° C. C(5)PWO24 3CCP1 5 3CPP2 5 2CPWO2 6 3CCWO2 4 3CCW1 5 3CPWO2 9 4CPWO2 5 Total 100

Example 14 of Host Liquid Crystal

The nematic host liquid crystal Host 14 is prepared according to Table14 below.

TABLE 14 Composition and performance parameters of Host 14 Code ofWeight component percentage Performance parameters 3CC1 13 Δn 0.1 3CCV111 Δε −3.3 5CC3 4 Cp 72.9 3CCP1 11 γ1 98 3CPP2 5 LTS <−30° C. 3CWO2 143CWO4 3 5CWO2 13 3CCWO1 5 2CPWO2 6 3CCWO2 3 3CPWO2 12 Total 100

Examples of PSA-Type Liquid Crystal Composition

The PSA-type liquid crystal compositions of Examples 1-308 are preparedby adding the compounds in Table 15 to the nematic host liquid crystalsHost 1 to Host 14 at the concentrations shown in Tables 17-30respectively, and then tested for relevant performance parameters byfilling the same into a VA-type test cell.

TABLE 15

I-1-1a

I-1-1b

I-1-1c

I-1-9a

I-1-13a

I-1-17a

I-1-21a

I-2-1a

I-2-1b

I-2-13a

I-2-25a

I-2-29a

I-2-33a

I-2-41a

I-2-53a

I-3-1a

I-3-1b

I-3-5a

I-3-17a

For comparison purposes, the PSA-type liquid crystal compositions ofComparative Examples 1-39 are prepared by adding the polymerizablecompounds M1 and M2 known in the prior art to the nematic host liquidcrystal Host 1 to Host 14 at the concentrations shown in Table 16respectively, and then tested for relevant performance parameters byfilling the same into a VA-type test cell.

Comparative Examples 1-39 Proportion of Proportion polymerizable ChangesPolymerizable of Host compound in pretilt Zara Host compound (%) (%)Intersolubility angle Particle Comparative Host M1 99.65 0.35 There is —— Example 1 1 crystallization at room temperature Comparative Host M199.65 0.35 There is — — Example 2 2 crystallization at room temperatureComparative Host M1 99.65 0.35 There is — — Example 3 3 crystallizationat room temperature Comparative Host M1 99.65 0.35 There is — — Example4 4 crystallization at room temperature Comparative Host M1 99.65 0.35There is — — Example 5 5 crystallization at room temperature ComparativeHost M1 99.65 0.35 There is — — Example 6 6 crystallization at roomtemperature Comparative Host M1 99.65 0.35 There is — — Example 7 7crystallization at room temperature Comparative Host M1 99.65 0.35 Thereis — — Example 8 8 crystallization at room temperature Comparative HostM1 99.65 0.35 There is — — Example 9 9 crystallization at roomtemperature Comparative Host M1 99.65 0.35 There is — — Example 10 10crystallization at room temperature Comparative Host M1 99.65 0.35 Thereis — — Example 11 11 crystallization at room temperature ComparativeHost M1 99.65 0.35 There is — — Example 12 12 crystallization at roomtemperature Comparative Host M1 99.65 0.35 There is — — Example 13 13crystallization at room temperature Comparative Host M1 99.75 0.25 Thereis <0.2 Yes Example 14 14 crystallization when stored at −10° C. for 0.5h, and no crystallization at room temperature Comparative Host M1 99.750.25 There is <0.2 Yes Example 15 1 crystallization when stored at −10°C. for 0.5 h, and no crystallization at room temperature ComparativeHost M1 99.75 0.25 There is <0.2 Yes Example 16 2 crystallization whenstored at −10° C. for 0.5 h, and no crystallization at room temperatureComparative Host M1 99.75 0.25 There is <0.2 Yes Example 17 3crystallization when stored at −10° C. for 0.5 h, and no crystallizationat room temperature Comparative Host M1 99.75 0.25 There is <0.2 YesExample 18 4 crystallization when stored at −10° C. for 0.5 h, and nocrystallization at room temperature Comparative Host M1 99.75 0.25 Thereis <0.2 Yes Example 19 5 crystallization when stored at −10° C. for 0.5h, and no crystallization at room temperature Comparative Host M1 99.750.25 There is <0.2 Yes Example 20 6 crystallization when stored at −10°C. for 0.5 h, and no crystallization at room temperature ComparativeHost M1 99.75 0.25 There is <0.2 Yes Example 21 7 crystallization whenstored at −10° C. for 0.5 h, and no crystallization at room temperatureComparative Host M1 99.75 0.25 There is <0.2 Yes Example 22 8crystallization when stored at −10° C. for 0.5 h, and no crystallizationat room temperature Comparative Host M1 99.75 0.25 There is <0.2 YesExample 23 9 crystallization when stored at −10° C. for 0.5 h, and nocrystallization at room temperature Comparative Host M1 99.75 0.25 Thereis <0.2 Yes Example 24 10 crystallization when stored at −10° C. for 0.5h, and no crystallization at room temperature Comparative Host M1 99.750.25 There is <0.2 Yes Example 25 11 crystallization when stored at −10°C. for 0.5 h, and no crystallization at room temperature ComparativeHost M1 99.75 0.25 There is <0.2 Yes Example 26 12 crystallization whenstored at −10° C. for 0.5 h, and no crystallization at room temperatureComparative Host M2 99.7 0.3 There is no >0.5 No Example 27 1crystallization at a temperature below −30° C. Comparative Host M2 99.70.3 There is no >0.4 No Example 28 2 crystallization at a temperaturebelow −30° C. Comparative Host M2 99.7 0.3 There is no >0.4 No Example29 3 crystallization at a temperature below −30° C. Comparative Host M299.7 0.3 There is no >0.4 No Example 30 4 crystallization at atemperature below −30° C. Comparative Host M2 99.7 0.3 There is no >0.4No Example 31 5 crystallization at a temperature below −30° C.Comparative Host M2 99.7 0.3 There is no >0.4 No Example 32 6crystallization at a temperature below −30° C. Comparative Host M2 99.70.3 There is no >0.4 No Example 33 7 crystallization at a temperaturebelow −30° C. Comparative Host M2 99.7 0.3 There is no >0.4 No Example34 8 crystallization at a temperature below −30° C. Comparative Host M299.7 0.3 There is no >0.4 No Example 35 9 crystallization at atemperature below −30° C. Comparative Host M2 99.7 0.3 There is no >0.4No Example 36 10 crystallization at a temperature below −30° C.Comparative Host M2 99.7 0.3 There is no >0.4 No Example 37 11crystallization at a temperature below −30° C. Comparative Host M2 99.70.3 There is no >0.4 No Example 38 12 crystallization at a temperaturebelow −30° C. Comparative Host M2 99.7 0.3 There is no >0.4 No Example39 13 crystallization at a temperature below −30° C. “—” refers to thatthe detection is unavailable.

Examples 1-22

TABLE 17 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No  1 1 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No  2 1 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No  3 1 crystallization at a temperature below −30° C. Example Host99.7 I-2-1a 0.3 There is no <0.2 No  4 1 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No  5 1 crystallization at a temperature below −30° C. Example Host99.7 I-2-13a 0.3 There is no <0.2 No  6 1 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No  7 1 crystallization at a temperature below −30° C. Example Host99.77 I-2-53a 0.23 There is no <0.2 No  8 1 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No  9 1 crystallization at a temperature below −30° C. Example Host99.75 I-3-5a 0.25 There is no <0.2 No 10 1 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No 11 1 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 12 1 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 13 1 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 14 1 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 15 1 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 16 1 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 17 1 I-2-13a 0.15 crystallization at a temperature below −30° C.Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 18 1 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 19 1 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 20 1 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 21 1 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 22 1 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 23-44

TABLE 18 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No 23 2 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No 24 2 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No 25 2 crystallization at a temperature below −30° C. Example Host99.7 I-2-1a 0.3 There is no <0.2 No 26 2 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No 27 2 crystallization at a temperature below −30° C. Example Host99.7 I-2-13a 0.3 There is no <0.2 No 27 2 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No 29 2 crystallization at a temperature below −30° C. Example Host99.77 I-2-53a 0.23 There is no <0.2 No 30 2 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No 31 2 crystallization at a temperature below −30° C. Example Host99.75 I-3-5a 0.25 There is no <0.2 No 32 2 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No 33 2 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 34 2 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 35 2 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 36 2 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 37 2 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 38 2 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 39 2 I-2-13a 0.15 crystallization at a temperature below −30° C.Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 40 2 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 41 2 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 42 2 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 43 2 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 44 2 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 45-66

TABLE 19 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No 45 3 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No 46 3 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No 47 3 crystallization at a temperature below −30° C. Example Host99.7 I-2-1a 0.3 There is no <0.2 No 48 3 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No 49 3 crystallization at a temperature below −30° C. Example Host99.7 I-2-13a 0.3 There is no <0.2 No 50 3 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No 51 3 crystallization at a temperature below −30° C. Example Host99.77 I-2-53a 0.23 There is no <0.2 No 52 3 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No 53 3 crystallization at a temperature below −30° C. Example Host99.75 I-3-5a 0.25 There is no <0.2 No 54 3 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No 55 3 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 56 3 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 57 3 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 58 3 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 59 3 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 60 3 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 61 3 I-2-13a 0.15 crystallization at a temperature below −30° C.Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 62 3 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 63 3 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 64 3 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 65 3 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 66 3 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 67-88

TABLE 20 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No 67 4 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No 68 4 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No 69 4 crystallization at a temperature below −30° C. Example Host99.7 I-2-1a 0.3 There is no <0.2 No 70 4 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No 71 4 crystallization at a temperature below −30° C. Example Host99.7 I-2-13a 0.3 There is no <0.2 No 72 4 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No 73 4 crystallization at a temperature below −30° C. Example Host99.77 I-2-53a 0.23 There is no <0.2 No 74 4 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No 75 4 crystallization at a temperature below −30° C. Example Host99.75 I-3-5a 0.25 There is no <0.2 No 76 4 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No 77 4 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 78 4 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 79 4 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 80 4 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 81 4 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 82 4 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 83 4 I-2-13a 0.15 crystallization at a temperature below −30° C.Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 84 4 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 85 4 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 86 4 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 87 4 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 88 4 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 89-110

TABLE 21 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No  89 5 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No  90 5 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No  91 5 crystallization at a temperature below −30° C. ExampleHost 99.7 I-2-1a 0.3 There is no <0.2 No  92 5 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No  93 5 crystallization at a temperature below −30° C. ExampleHost 99.7 I-2-13a 0.3 There is no <0.2 No  94 5 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No  95 5 crystallization at a temperature below −30° C. ExampleHost 99.77 I-2-53a 0.23 There is no <0.2 No  96 5 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No  97 5 crystallization at a temperature below −30° C. ExampleHost 99.75 I-3-5a 0.25 There is no <0.2 No  98 5 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No  99 5 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 100 5 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 101 5 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 102 5 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 103 5 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 104 5 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 105 5 I-2-13a 0.15 crystallization at a temperature below −30°C. Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 106 5 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 107 5 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 108 5 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 109 5 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 110 5 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 111-132

TABLE 22 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No 111 6 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No 112 6 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No 113 6 crystallization at a temperature below −30° C. ExampleHost 99.7 I-2-1a 0.3 There is no <0.2 No 114 6 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No 115 6 crystallization at a temperature below −30° C. ExampleHost 99.7 I-2-13a 0.3 There is no <0.2 No 116 6 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No 117 6 crystallization at a temperature below −30° C. ExampleHost 99.77 I-2-53a 0.23 There is no <0.2 No 118 6 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No 119 6 crystallization at a temperature below −30° C. ExampleHost 99.75 I-3-5a 0.25 There is no <0.2 No 120 6 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No 121 6 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 122 6 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 123 6 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 124 6 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 125 6 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 126 6 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 127 6 I-2-13a 0.15 crystallization at a temperature below −30°C. Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 128 6 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 129 6 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 130 6 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 131 6 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 132 6 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 133-154

TABLE 23 Proportion of Proportion polymerizable Changes of HostPolymerizable compound in pretilt Zara Host (%) compound (%)Intersolubility angle Particle Example Host 99.65 I-1-1b 0.35 There isno <0.2 No 133 7 crystallization at a temperature below −30° C. ExampleHost 99.7 I-1-1c 0.3 There is no <0.2 No 134 7 crystallization at atemperature below −30° C. Example Host 99.75 I-1-9a 0.25 There is no<0.2 No 135 7 crystallization at a temperature below −30° C. ExampleHost 99.7 I-2-1a 0.3 There is no <0.2 No 136 7 crystallization at atemperature below −30° C. Example Host 99.65 I-2-1b 0.35 There is no<0.2 No 137 7 crystallization at a temperature below −30° C. ExampleHost 99.7 I-2-13a 0.3 There is no <0.2 No 138 7 crystallization at atemperature below −30° C. Example Host 99.75 I-2-41a 0.25 There is no<0.2 No 139 7 crystallization at a temperature below −30° C. ExampleHost 99.77 I-2-53a 0.23 There is no <0.2 No 140 7 crystallization at atemperature below −30° C. Example Host 99.77 I-3-1b 0.23 There is no<0.2 No 141 7 crystallization at a temperature below −30° C. ExampleHost 99.75 I-3-5a 0.25 There is no <0.2 No 142 7 crystallization at atemperature below −30° C. Example Host 99.7 I-1-1a 0.2 There is no <0.2No 143 7 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 99.7 I-1-13a 0.18 There is no <0.2 No 144 7 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 99.7 I-1-17a0.15 There is no <0.2 No 145 7 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-21a 0.1 There is no <0.2No 146 7 I-2-25a 0.1 crystallization at a I-3-1a 0.1 temperature below−30° C. Example Host 99.72 I-2-29a 0.18 There is no <0.2 No 147 7 I-3-1b0.1 crystallization at a temperature below −30° C. Example Host 99.7I-2-33a 0.15 There is no <0.2 No 148 7 I-3-5a 0.15 crystallization at atemperature below −30° C. Example Host 99.7 I-1-17a 0.15 There is no<0.2 No 149 7 I-2-13a 0.15 crystallization at a temperature below −30°C. Example Host 99.74 I-1-9a 0.17 There is no <0.2 No 150 7 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 99.7 I-1-1b0.15 There is no <0.2 No 151 7 I-2-53a 0.05 crystallization at a I-3-5a0.1 temperature below −30° C. Example Host 99.68 I-2-29a 0.25 There isno <0.2 No 152 7 I-3-1a 0.07 crystallization at a temperature below −30°C. Example Host 99.72 I-1-9a 0.25 There is no <0.2 No 153 7 I-3-17a 0.03crystallization at a temperature below −30° C. Example Host 99.73 I-2-1b0.25 There is no <0.2 No 154 7 I-2-41a 0.02 crystallization at atemperature below −30° C.

Examples 155-176

TABLE 24 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 8 99.65 I-1-1b 0.35 There isno <0.2 No 155 crystallization at a temperature below −30° C. ExampleHost 8 99.7 I-1-1c 0.3 There is no <0.2 No 156 crystallization at atemperature below −30° C. Example Host 8 99.75 I-1-9a 0.25 There is no<0.2 No 157 crystallization at a temperature below −30° C. Example Host8 99.7 I-2-1a 0.3 There is no <0.2 No 158 crystallization at atemperature below −30° C. Example Host 8 99.65 I-2-1b 0.35 There is no<0.2 No 159 crystallization at a temperature below −30° C. Example Host8 99.7 I-2-13a 0.3 There is no <0.2 No 160 crystallization at atemperature below −30° C. Example Host 8 99.75 I-2-41a 0.25 There is no<0.2 No 161 crystallization at a temperature below −30° C. Example Host8 99.77 1-2-53a 0.23 There is no <0.2 No 162 crystallization at atemperature below −30° C. Example Host 8 99.77 I-3-1b 0.23 There is no<0.2 No 163 crystallization at a temperature below −30° C. Example Host8 99.75 I-3-5a 0.25 There is no <0.2 No 164 crystallization at atemperature below −30° C. Example Host 8 99.7 I-1-1a 0.2 There is no<0.2 No 165 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 8 99.7 I-1-13a 0.18 There is no <0.2 No 166 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 8 99.7I-1-17a 0.15 There is no <0.2 No 167 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 8 99.7 I-1-21a 0.1 There is no<0.2 No 168 I-2-25a 0.1 crystallization at I-3-1a 0.1 a temperaturebelow −30° C. Example Host 8 99.72 I-2-29a 0.18 There is no <0.2 No 169I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host 899.7 I-2-33a 0.15 There is no <0.2 No 170 I-3-5a 0.15 crystallization ata temperature below −30° C. Example Host 8 99.7 I-1-17a 0.15 There is no<0.2 No 171 I-2-13a 0.15 crystallization at a temperature below −30° C.Example Host 8 99.74 I-1-9a 0.17 There is no <0.2 No 172 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 8 99.7I-1-1b 0.15 There is no <0.2 No 173 I-2-53a 0.05 crystallization atI-3-5a 0.1 a temperature below −30° C. Example Host 8 99.68 I-2-29a 0.25There is no <0.2 No 174 I-3-1a 0.07 crystallization at a temperaturebelow −30° C. Example Host 8 99.72 I-1-9a 0.25 There is no <0.2 No 175I-3-17a 0.03 crystallization at a temperature below −30° C. Example Host8 99.73 I-2-1b 0.25 There is no <0.2 No 176 I-2-41a 0.02 crystallizationat a temperature below −30° C.

Examples 177-198

TABLE 25 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 9 99.65 I-1-1b 0.35 There isno <0.2 No 177 crystallization at a temperature below −30° C. ExampleHost 9 99.7 I-1-1c 0.3 There is no <0.2 No 178 crystallization at atemperature below −30° C. Example Host 9 99.75 I-1-9a 0.25 There is no<0.2 No 179 crystallization at a temperature below −30° C. Example Host9 99.7 I-2-1a 0.3 There is no <0.2 No 180 crystallization at atemperature below −30° C. Example Host 9 99.65 I-2-1b 0.35 There is no<0.2 No 181 crystallization at a temperature below −30° C. Example Host9 99.7 I-2-13a 0.3 There is no <0.2 No 182 crystallization at atemperature below −30° C. Example Host 9 99.75 I-2-41a 0.25 There is no<0.2 No 183 crystallization at a temperature below −30° C. Example Host9 99.77 I-2-53a 0.23 There is no <0.2 No 184 crystallization at atemperature below −30° C. Example Host 9 99.77 I-3-1b 0.23 There is no<0.2 No 185 crystallization at a temperature below −30° C. Example Host9 99.75 I-3-5a 0.25 There is no <0.2 No 186 crystallization at atemperature below −30° C. Example Host 9 99.7 I-1-1a 0.2 There is no<0.2 No 187 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 9 99.7 I-1-13a 0.18 There is no <0.2 No 188 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 9 99.7I-1-17a 0.15 There is no <0.2 No 189 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 9 99.7 I-1-21a 0.1 There is no<0.2 No 190 I-2-25a 0.1 crystallization at I-3-1a 0.1 a temperaturebelow −30° C. Example Host 9 99.72 I-2-29a 0.18 There is no <0.2 No 191I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host 999.7 I-2-33a 0.15 There is no <0.2 No 192 I-3-5a 0.15 crystallization ata temperature below −30° C. Example Host 9 99.7 I-1-17a 0.15 There is no<0.2 No 193 I-2-13a 0.15 crystallization at a temperature below −30° C.Example Host 9 99.74 I-1-9a 0.17 There is no <0.2 No 194 I-2-41a 0.09crystallization at a temperature below −30° C. Example Host 9 99.7I-1-1b 0.15 There is no <0.2 No 195 I-2-53a 0.05 crystallization atI-3-5a 0.1 a temperature below −30° C. Example Host 9 99.68 I-2-29a 0.25There is no <0.2 No 196 I-3-1a 0.07 crystallization at a temperaturebelow −30° C. Example Host 9 99.72 I-1-9a 0.25 There is no <0.2 No 197I-3-17a 0.03 crystallization at a temperature below −30° C. Example Host9 99.73 I-2-1b 0.25 There is no <0.2 No 198 I-2-41a 0.02 crystallizationat a temperature below −30° C.

Examples 199-220

TABLE 26 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 10 99.65 I-1-1b 0.35 Thereis no <0.2 No 199 crystallization at a temperature below −30° C. ExampleHost 10 99.7 I-1-1c 0.3 There is no <0.2 No 200 crystallization at atemperature below −30° C. Example Host 10 99.75 I-1-9a 0.25 There is no<0.2 No 201 crystallization at a temperature below −30° C. Example Host10 99.7 I-2-1a 0.3 There is no <0.2 No 202 crystallization at atemperature below −30° C. Example Host 10 99.65 I-2-1b 0.35 There is no<0.2 No 203 crystallization at a temperature below −30° C. Example Host10 99.7 I-2-13a 0.3 There is no <0.2 No 204 crystallization at atemperature below −30° C. Example Host 10 99.75 I-2-41a 0.25 There is no<0.2 No 205 crystallization at a temperature below −30° C. Example Host10 99.77 I-2-53a 0.23 There is no <0.2 No 206 crystallization at atemperature below −30° C. Example Host 10 99.77 I-3-1b 0.23 There is no<0.2 No 207 crystallization at a temperature below −30° C. Example Host10 99.75 I-3-5a 0.25 There is no <0.2 No 208 crystallization at atemperature below −30° C. Example Host 10 99.7 I-1-1a 0.2 There is no<0.2 No 209 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 10 99.7 I-1-13a 0.18 There is no <0.2 No 210 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 10 99.7I-1-17a 0.15 There is no <0.2 No 211 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 10 99.7 I-1-21a 0.1 There is no<0.2 No 212 I-2-25a 0.1 crystallization at I-3-1a 0.1 a temperaturebelow −30° C. Example Host 10 99.72 I-2-29a 0.18 There is no <0.2 No 213I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host10 99.7 I-2-33a 0.15 There is no <0.2 No 214 I-3-5a 0.15 crystallizationat a temperature below −30° C. Example Host 10 99.7 I-1-17a 0.15 Thereis no <0.2 No 215 I-2-13a 0.15 crystallization at a temperature below−30° C. Example Host 10 99.74 I-1-9a 0.17 There is no <0.2 No 216I-2-41a 0.09 crystallization at a temperature below −30° C. Example Host10 99.7 I-1-1b 0.15 There is no <0.2 No 217 I-2-53a 0.05 crystallizationat I-3-5a 0.1 a temperature below −30° C. Example Host 10 99.68 I-2-29a0.25 There is no <0.2 No 218 I-3-1a 0.07 crystallization at atemperature below −30° C. Example Host 10 99.72 I-1-9a 0.25 There is no<0.2 No 219 I-3-17a 0.03 crystallization at a temperature below −30° C.Example Host 10 99.73 I-2-1b 0.25 There is no <0.2 No 220 I-2-41a 0.02crystallization at a temperature below −30° C.

Examples 221-242

TABLE 27 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 11 99.65 I-1-1b 0.35 Thereis no <0.2 No 221 crystallization at a temperature below −30° C. ExampleHost 11 99.7 I-1-1c 0.3 There is no <0.2 No 222 crystallization at atemperature below −30° C. Example Host 11 99.75 I-1-9a 0.25 There is no<0.2 No 223 crystallization at a temperature below −30° C. Example Host11 99.7 I-2-1a 0.3 There is no <0.2 No 224 crystallization at atemperature below −30° C. Example Host 11 99.65 I-2-1b 0.35 There is no<0.2 No 225 crystallization at a temperature below −30° C. Example Host11 99.7 I-2-13a 0.3 There is no <0.2 No 226 crystallization at atemperature below −30° C. Example Host 11 99.75 I-2-41a 0.25 There is no<0.2 No 227 crystallization at a temperature below −30° C. Example Host11 99.77 I-2-53a 0.23 There is no <0.2 No 228 crystallization at atemperature below −30° C. Example Host 11 99.77 I-3-1b 0.23 There is no<0.2 No 229 crystallization at a temperature below −30° C. Example Host11 99.75 I-3-5a 0.25 There is no <0.2 No 230 crystallization at atemperature below −30° C. Example Host 11 99.7 I-1-1a 0.2 There is no<0.2 No 231 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 11 99.7 I-1-13a 0.18 There is no <0.2 No 232 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 11 99.7I-1-17a 0.15 There is no <0.2 No 233 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 11 99.7 I-1-21a 0.1 There is no<0.2 No 234 I-2-25a 0.1 crystallization at I-3-1a 0.1 a temperaturebelow −30° C. Example Host 11 99.72 I-2-29a 0.18 There is no <0.2 No 235I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host11 99.7 I-2-33a 0.15 There is no <0.2 No 236 I-3-5a 0.15 crystallizationat a temperature below −30° C. Example Host 11 99.7 I-1-17a 0.15 Thereis no <0.2 No 237 I-2-13a 0.15 crystallization at a temperature below−30° C. Example Host 11 99.74 I-1-9a 0.17 There is no <0.2 No 238I-2-41a 0.09 crystallization at a temperature below −30° C. Example Host11 99.7 I-1-1b 0.15 There is no <0.2 No 239 I-2-53a 0.05 crystallizationat I-3-5a 0.1 a temperature below −30° C. Example Host 11 99.68 I-2-29a0.25 There is no <0.2 No 240 I-3-1a 0.07 crystallization at atemperature below −30° C. Example Host 11 99.72 I-1-9a 0.25 There is no<0.2 No 241 I-3-17a 0.03 crystallization at a temperature below −30° C.Example Host 11 99.73 I-2-1b 0.25 There is no <0.2 No 242crystallization at I-2-41a 0.02 a temperature below −30° C.

Examples 243-264

TABLE 28 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 12 99.65 I-1-1b 0.35 Thereis no <0.2 No 243 crystallization at a temperature below −30° C. ExampleHost 12 99.7 I-1-1c 0.3 There is no <0.2 No 244 crystallization at atemperature below −30° C. Example Host 12 99.75 I-1-9a 0.25 There is no<0.2 No 245 crystallization at a temperature below −30° C. Example Host12 99.7 I-2-1a 0.3 There is no <0.2 No 246 crystallization at atemperature below −30° C. Example Host 12 99.65 I-2-1b 0.35 There is no<0.2 No 247 crystallization at a temperature below −30° C. Example Host12 99.7 I-2-13a 0.3 There is no <0.2 No 248 crystallization at atemperature below −30° C. Example Host 12 99.75 I-2-41a 0.25 There is no<0.2 No 249 crystallization at a temperature below −30° C. Example Host12 99.77 I-2-53a 0.23 There is no <0.2 No 250 crystallization at atemperature below −30° C. Example Host 12 99.77 I-3-1b 0.23 There is no<0.2 No 251 crystallization at a temperature below −30° C. Example Host12 99.75 I-3-5a 0.25 There is no <0.2 No 252 crystallization at atemperature below −30° C. Example Host 12 99.7 I-1-1a 0.2 There is no<0.2 No 253 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 12 99.7 I-1-13a 0.18 There is no <0.2 No 254 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 12 99.7I-1-17a 0.15 There is no <0.2 No 255 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 12 99.7 I-1-21a 0.1 There is no<0.2 No 256 I-2-25a 0.1 crystallization at I-3-1a 0.1 a temperaturebelow −30° C. Example Host 12 99.72 I-2-29a 0.18 There is no <0.2 No 257I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host12 99.7 I-2-33a 0.15 There is no <0.2 No 258 I-3-5a 0.15 crystallizationat a temperature below −30° C. Example Host 12 99.7 I-1-17a 0.15 Thereis no <0.2 No 259 I-2-13a 0.15 crystallization at a temperature below−30° C. Example Host 12 99.74 I-1-9a 0.17 There is no <0.2 No 260I-2-41a 0.09 crystallization at a temperature below −30° C. Example Host12 99.7 I-1-1b 0.15 There is no <0.2 No 261 I-2-53a 0.05 crystallizationat I-3-5a 0.1 a temperature below −30° C. Example Host 12 99.68 I-2-29a0.25 There is no <0.2 No 262 I-3-1a 0.07 crystallization at atemperature below −30° C. Example Host 12 99.72 I-1-9a 0.25 There is no<0.2 No 263 I-3-17a 0.03 crystallization at a temperature below −30° C.Example Host 12 99.73 I-2-1b 0.25 There is no <0.2 No 264 I-2-41a 0.02crystallization at a temperature below −30° C.

Examples 265-286

TABLE 29 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 13 99.65 I-1-1b 0.35 Thereis no <0.2 No 265 crystallization at a temperature below −30° C. ExampleHost 13 99.7 I-1-1c 0.3 There is no <0.2 No 266 crystallization at atemperature below −30° C. Example Host 13 99.75 I-1-9a 0.25 There is no<0.2 No 267 crystallization at a temperature below −30° C. Example Host13 99.7 I-2-1a 0.3 There is no <0.2 No 268 crystallization at atemperature below −30° C. Example Host 13 99.65 I-2-1b 0.35 There is no<0.2 No 269 crystallization at a temperature below −30° C. Example Host13 99.7 I-2-13a 0.3 There is no <0.2 No 270 crystallization at atemperature below −30° C. Example Host 13 99.75 I-2-41a 0.25 There is no<0.2 No 271 crystallization at a temperature below −30° C. Example Host13 99.77 I-2-53a 0.23 There is no <0.2 No 272 crystallization at atemperature below −30° C. Example Host 13 99.77 I-3-1b 0.23 There is no<0.2 No 273 crystallization at a temperature below −30° C. Example Host13 99.75 I-3-5a 0.25 There is no <0.2 No 274 crystallization at atemperature below −30° C. Example Host 13 99.7 I-1-1a 0.2 There is no<0.2 No 275 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 13 99.7 I-1-13a 0.18 There is no <0.2 No 276 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 13 99.7I-1-17a 0.15 There is no <0.2 No 277 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 13 99.7 I-1-21a 0.1 There is no<0.2 No 278 I-2-25a 0.1 crystallization at I-3-1a 0.1 a temperaturebelow −30° C. Example Host 13 99.72 I-2-29a 0.18 There is no <0.2 No 279I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host13 99.7 I-2-33a 0.15 There is no <0.2 No 280 I-3-5a 0.15 crystallizationat a temperature below −30° C. Example Host 13 99.7 I-1-17a 0.15 Thereis no <0.2 No 281 I-2-13a 0.15 crystallization at a temperature below−30° C. Example Host 13 99.74 I-1-9a 0.17 There is no <0.2 No 282I-2-41a 0.09 crystallization at a temperature below −30° C. Example Host13 99.7 I-1-1b 0.15 There is no <0.2 No 283 I-2-53a 0.05 crystallizationat I-3-5a 0.1 a temperature below −30° C. Example Host 13 99.68 I-2-29a0.25 There is no <0.2 No 284 I-3-1a 0.07 crystallization at atemperature below −30° C. Example Host 13 99.72 I-1-9a 0.25 There is no<0.3 No 285 I-3-17a 0.03 crystallization at a temperature below −30° C.Example Host 13 99.73 I-2-1b 0.25 There is no <0.3 No 286 I-2-41a 0.02crystallization at a temperature below −30° C.

Examples 287-308

TABLE 30 Proportion Proportion of Changes of Host Polymerizablepolymerizable in pretilt Zara Host (%) compound compound (%)Intersolubility angle Particle Example Host 14 99.65 I-1-1b 0.35 Thereis no <0.2 No 287 crystallization at a temperature below −30° C. ExampleHost 14 99.7 I-1-1c 0.3 There is no <0.2 No 288 crystallization at atemperature below −30° C. Example Host 14 99.75 I-1-9a 0.25 There is no<0.2 No 289 crystallization at a temperature below −30° C. Example Host14 99.7 I-2-1a 0.3 There is no <0.2 No 290 crystallization at atemperature below −30° C. Example Host 14 99.65 I-2-1b 0.35 There is no<0.2 No 291 crystallization at a temperature below −30° C. Example Host14 99.7 I-2-13a 0.3 There is no <0.2 No 292 crystallization at atemperature below −30° C. Example Host 14 99.75 I-2-41a 0.25 There is no<0.2 No 293 crystallization at a temperature below −30° C. Example Host14 99.77 I-2-53a 0.23 There is no <0.2 No 294 crystallization at atemperature below −30° C. Example Host 14 99.77 I-3-1b 0.23 There is no<0.2 No 295 crystallization at a temperature below −30° C. Example Host14 99.75 I-3-5a 0.25 There is no <0.2 No 296 crystallization at atemperature below −30° C. Example Host 14 99.7 I-1-1a 0.2 There is no<0.2 No 297 I-2-25a 0.1 crystallization at a temperature below −30° C.Example Host 14 99.7 I-1-13a 0.18 There is no <0.2 No 298 I-3-1a 0.12crystallization at a temperature below −30° C. Example Host 14 99.7I-1-17a 0.15 There is no <0.2 No 299 I-3-1b 0.15 crystallization at atemperature below −30° C. Example Host 14 99.7 I-1-21a 0.1 There is no<0.2 No 300 I-2-25a 0.1 crystallization at 1-3-1a 0.1 a temperaturebelow −30° C. Example Host 14 99.72 I-2-29a 0.18 There is no <0.2 No 301I-3-1b 0.1 crystallization at a temperature below −30° C. Example Host14 99.7 I-2-33a 0.15 There is no <0.2 No 302 I-3-5a 0.15 crystallizationat a temperature below −30° C. Example Host 14 99.7 I-1-17a 0.15 Thereis no <0.2 No 303 I-2-13a 0.15 crystallization at a temperature below−30° C. Example Host 14 99.74 I-1-9a 0.17 There is no <0.2 No 304I-2-41a 0.09 crystallization at a temperature below −30° C. Example Host14 99.7 I-1-1b 0.15 There is no <0.2 No 305 I-2-53a 0.05 crystallizationat I-3-5a 0.1 a temperature below −30° C. Example Host 14 99.68 I-2-29a0.25 There is no <0.2 No 306 I-3-1a 0.07 crystallization at atemperature below −30° C. Example Host 14 99.72 I-1-9a 0.25 There is no<0.2 No 307 I-3-17a 0.03 crystallization at a temperature below −30° C.Example Host 14 99.73 I-2-1b 0.25 There is no <0.2 No 308 I-2-41a 0.02crystallization at a temperature below −30° C.

As can be seen from the data of the above Comparative Examples andExamples, the PSA-type liquid crystal composition provided by thepresent invention has better intersolubility, cannot be crystallized ata low temperature, can form a stable pretilt angle, and avoids theoccurrence of a display defect, such as Zara Particle, during thepolymerization.

The above embodiments are merely illustrative of the technical conceptsand features of the present invention, and provided for facilitating theunderstanding and practice of the present invention by those skilled inthe art. However, the protection scope of the invention is not limitedthereto. Equivalent variations or modifications made without departingfrom the spirit and essence of the present invention are intended to becontemplated within the protection scope of the present invention.

What is claimed is:
 1. A PSA liquid crystal composition comprising: ahost liquid crystal component A and a polymerizable component B, whereinthe host liquid crystal component A comprises one or more liquid crystalcompounds, and the polymerizable component B comprises: at least onecompound selected from a group consisting of the compounds of generalformula I-2 and general formula I-3:

in which, ring C, ring D, ring E, ring F, ring G, ring H and ring I eachindependently represents phenylene or naphthylene; X₂₋₂, X₂₋₃, X₂₋₄,X₃₋₂, X₃₋₃, and X₃₋₄ each independently represents a single bond, or aC₁₋₁₂ linear or branched alkylene, wherein one or more —CH₂— in theC₁₋₁₂ linear alkylene or in the C₃₋₁₂ branched alkylene can be replacedby —O—, —S—, —CO—, —CH═CH— or —C≡C— in a manner that heteroatoms are notdirectly connected to each other, —H in one or more —CH₂— in the C₁₋₁₂linear alkylene or in the C₃₋₁₂ branched alkylene can be substituted byhalogen; R_(C), R_(D), R_(E), R_(F), R_(G), R_(H) and R_(I) eachindependently represents halogen, or a C₁₋₅ halogenated or unhalogenatedlinear alkyl or alkoxy, or a C₃₋₅ halogenated or unhalogenated branchedalkyl or alkoxy; P₂₋₁, P₂₋₂, P₃₋₁ and P₃₋₂ each independently representsa polymerizable group; f, g, h and i each independently represents 0, 1,2 or 3; c, d, and e each independently represents 0 or 1, and when f is2 or 3, R_(F) can be same or different; when g is 2 or 3, R_(G) can besame or different; when h is 2 or 3, R_(H) can be same or different;when i is 2 or 3, R_(I) can be same or different; wherein both X₂₋₁ andX₂₋₄ represent a single bond, at least one of X₂₋₂ and X₂₋₃ is not asingle bond, and c+d+e≥1, and n₂≥1, and c+d+e+n₂≥3, wherein n₂represents the number of groups that are not single bond in X₂₋₁, X₂₋₂,X₂₋₃ and X₂₋₄; and wherein X₃₋₁ and X₃₋₅ are single bond, and at leastone of X₃₋₂, X₃₋₃ and X₃₋₄ is not a single bond, and f+g+h+i≥2, n₃≥1,wherein n₃ represents the number of groups that are not single bond inX₃₋₁, X₃₋₂, X₃₋₃, X₃₋₄ and X₃₋₅.
 2. The PSA liquid crystal compositionaccording to claim 1, wherein f+g+h+i+n₃≥4.
 3. The PSA liquid crystalcomposition according to claim 1, wherein X₂₋₂, X₂₋₃, X₃₋₂, X₃₋₃ andX₃₋₄ each independently represents a single bond, —CH₂O—, —OCH₂—,—CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₃O—, —O(CH₂)₃—, —O—, —CF₂—, —CF₂O—,—OCF₂—, —CH(CH₃)CH₂—, —C(CH₃)₂CH₂—, —CH₂C(CH₃)₂—, —C(CH₃)₂CH(CH₃)—,—C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—, —OC(CH₃)₂—, —CH(CH₂CH₃)CH₂—, —S—, —NH—,—NH—CO—O—, —O—CO—NH—, —SCH₂—, —CH₂S—, —CH═CH—, —C≡C—, —CH═CH—CO—O— or—O—CO—CH═CH.
 4. The PSA liquid crystal composition according to claim 1,wherein the polymerizable component B further comprises at least onecompound selected from a group consisting of the compounds of generalformula I-1:

in which, ring A and ring B each independently represents phenylene ornaphthylene; R_(A) and R_(B) each independently represents halogen, or aC₁₋₅ halogenated or unhalogenated linear alkyl or alkoxy, or a C₃₋₅halogenated or unhalogenated branched alkyl or alkoxy; P₁₋₁ and P₁₋₂each independently represents a polymerizable group; a and b eachindependently represents 0, 1, 2 or 3; and when a is 2 or 3, R_(A) canbe same or different; when b is 2 or 3, R_(B) can be same or different;and both X₁₋₁ and X₁₋₃ represent single bond, and X₁₋₂ represents—CH₂O—, —OCH₂—, —CO—O—, —O—CO—, —CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₃O—,—O(CH₂)₃—, —O—, —CF₂—, —CF₂O—, —OCF₂—, —CH(CH₃)CH₂—, —C(CH₃)₂CH₂—,—CH₂C(CH₃)₂—, —C(CH₃)₂CH(CH₃)—, —C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—,—OC(CH₃)₂—, —CH(CH₂CH₃)CH₂—, —S—, —SCH₂—, —CH₂S—, —CH═CH—, —C≡C—,—CH═CH—CO—O— or —O—CO—CH═CH, wherein if X₁₋₂ represents —CO—O— or—O—CO—, then a+b≠0.
 5. The PSA liquid crystal composition according toclaim 4, wherein the polymerizable component B comprises two or threepolymerizable compounds, and wherein the at least one of said two orthree polymerizable compounds is selected from the compounds of generalformula I-3.
 6. The PSA liquid crystal composition according to claim 1,wherein the host liquid crystal component A comprises one or morecompounds of general formula M:

in which, R_(M1) and R_(M2) each independently represents a C₁₋₁₂ linearalkyl, a C₃₋₁₂ branched alkyl,

 one or more nonadjacent —CH₂— in the C₁₋₁₂ linear or branched alkyl caneach be independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —CO—O— or—O—CO—; ring M₁, ring M₂ and ring M₃ each independently represents

 wherein one or more —CH₂— in

 can be replaced by —O—, and at most one —H on

 can be substituted by halogen; Z_(M1) and Z_(M2) each independentlyrepresents a single bond, —CO—O—, —O—CO—, —CH₂O—, —OCH₂—, —CH═CH—,—C≡C—, —CH₂CH₂—, —(CH₂)₄—, —CF₂O—, —OCF₂— or —CF₂CF₂—; and n_(M1)represents 0, 1, 2 or 3, and when n_(M1)=2 or 3, ring M₂ can be same ordifferent, and Z_(M2) can be same or different.
 7. The PSA liquidcrystal composition according to claim 6, wherein the host liquidcrystal component A at least comprises one or more compounds selectedfrom a group consisting of the compounds of general formula M1-a,general formula M1-b and general formula M1-c:


8. The PSA liquid crystal composition according to claim 6, wherein thehost liquid crystal component A further comprises one or more compoundsof general formula N:

in which, R_(N1) and R_(N2) each independently represents a C₁₋₁₂ linearalkyl, a C₃₋₁₂ branched alkyl,

 one or more nonadjacent —CH₂— in the C₁₋₁₂ linear or branched alkyl caneach be independently replaced by —CH═CH—, —C≡C—, —O—, —CO—, —CO—O— or—O—CO—, and one or more —H presented in these groups can each beindependently substituted by —F or —Cl; ring

 and ring

 each independently represents

 wherein one or more —CH₂— in

 can be replaced by —O—, one or at most two single bonds in the ring canbe replaced by double bond, wherein one or more —H on

 can be substituted by —F or —Cl, and one or more —CH═ in the ring canbe replaced by —N═; Z_(N1) and Z_(N2) each independently represents asingle bond, —CO—O—, —O—CO—, —CH₂O—, —OCH₂—, —CH═CH—, —C≡C—, —CH₂CH₂—,—(CH₂)₄—, —CF₂O—, —OCF₂— or —CF₂CF₂—; and n_(N1) represents 0, 1, 2 or3, n_(N2) represents 0 or 1, and 0<n_(N1)+n_(N2)<3, when n_(N1=2) or 3,ring

 can be same or different, Z_(N1) can be same or different.
 9. The PSAliquid crystal composition according to claim 1, wherein thepolymerizable component B provides 0.01-5% of the total weight of thePSA liquid crystal composition.
 10. A liquid crystal display devicecomprising the PSA liquid crystal composition according to claim
 1. 11.The PSA liquid crystal composition according to claim 1, wherein if bothX₂₋₂ and X₂₋₃ represent —CO—O— or —O—CO—, then c+d+e≠0.
 12. The PSAliquid crystal composition according to claim 1, wherein if X₃₋₂, X₃₋₃and X₃₋₄ represent —CO—O— or —O—CO—, then f+g+h+i≠0.
 13. The PSA liquidcrystal composition according to claim 4, wherein the polymerizablecomponent B comprises two or three polymerizable compounds, and whereinthe at least one of said two or three polymerizable compounds isselected from the compounds of general formula I-2, both X₂₋₁ and X₂₋₄represent single bond, at least one of X₂₋₂ and X₂₋₃ is not a singlebond and c+d+e≥1.
 14. A PSA liquid crystal composition comprising: ahost liquid crystal component A and a polymerizable component B, whereinthe host liquid crystal component A comprises one or more liquid crystalcompounds, and the polymerizable component B comprises: at least onecompound selected from a group consisting of the compounds of generalformula I-1:

at least one compound selected from a group consisting of the compoundsof general formula I-2:

 and at least one compound selected from a group consisting of thecompounds of general formula I-3:

in which, ring A, ring B, ring C, ring D, ring E, ring F, ring G, ring Hand ring I each independently represents phenylene or naphthylene; X₂₋₂,X₂₋₃, X₂₋₄, X₃₋₂, X₃₋₃, and X₃₋₄ each independently represents a singlebond, a C₁₋₁₂ linear alkylene, a C₃₋₁₂ branched alkylene, wherein one ormore —CH₂— in the C₁₋₁₂ linear alkylene or in the C₃₋₁₂ branchedalkylene can be replaced by —O—, —S—, —CO—, —CH═CH— or —C≡C— in a mannerthat heteroatoms are not directly connected to each other, —H in one ormore —CH₂— in the C₁₋₁₂ linear alkylene or in the C₃₋₁₂ branchedalkylene can be substituted by halogen; R_(A), R_(B), R_(C), R_(D),R_(E), R_(F), R_(G), R_(H) and R_(I) each independently representshalogen, a C₁₋₅ halogenated or unhalogenated linear alkyl or alkoxy, ora C₃₋₅ halogenated or unhalogenated branched alkyl or alkoxy; P₁₋₁,P₁₋₂, P₂₋₁, P₂₋₂, P₃₋₁ and P₃₋₂ each independently represents apolymerizable group; a, b, c, d, e, f, g, h and i each independentlyrepresents 0, 1, 2 or 3, and when a is 2 or 3, R_(A) can be same ordifferent; when b is 2 or 3, R_(B) can be same or different; when c is 2or 3, R_(C) can be same or different; when d is 2 or 3, R_(D) can besame or different; when e is 2 or 3, R_(E) can be same or different;when f is 2 or 3, R_(F) can be same or different; when g is 2 or 3,R_(G) can be same or different; when h is 2 or 3, R_(H) can be same ordifferent; when i is 2 or 3, R_(I) can be same or different; whereinboth X₁₋₁ and X₁₋₃ represent single bond, and X₁₋₂ represents —CH₂O—,—OCH₂—, —CO—O—, —O—CO—, —CH₂CH₂—, —(CH₂)₃—, —(CH₂)₄—, —(CH₂)₃O—,—O(CH₂)₃—, —O—, —CF₂—, —CF₂O—, —OCF₂—, —CH(CH₃)CH₂—, —C(CH₃)₂CH₂—,—CH₂C(CH₃)₂—, —C(CH₃)₂CH(CH₃)—, —C(CH₃)₂C(CH₃)₂—, —C(CH₃)₂O—,—OC(CH₃)₂—, —CH(CH₂CH₃)CH₂—, —S—, —SCH₂—, —CH₂S—, —CH═CH—, —C≡C—,—CH═CH—CO—O— or —O—CO—CH═CH; wherein both X₂₋₁ and X₂₋₄ represent asingle bond, at least one of X₂₋₂ and X₂₋₃ is not a single bond, andc+d+e≥1, and n₂≥1, wherein n₂ represents the number of groups that arenot single bond in X₂₋₁, X₂₋₂, X₂₋₃ and X₂₋₄; and wherein X₃₋₁ and X₃₋₅are single bond, and at least one of X₃₋₂, X₃₋₃ and X₃₋₄ is not a singlebond, and f+g+h+i≥2, n₃>1, wherein n₃ represents the number of groupsthat are not single bond in X₃₋₁, X₃₋₂, X₃₋₃, X₃₋₄ and X₃₋₅.
 15. The PSAliquid crystal composition according to claim 4, wherein thepolymerizable component B comprises two or three polymerizablecompounds, and wherein the at least one of said two or threepolymerizable compounds is selected from the compounds of generalformula I-2.